function childContainer() {
	var Rect = new createjs.Shape();
	Rect.graphics.beginFill("#ff0000");
	Rect.graphics.drawRect(5,5,50,50);
	Rect.graphics.endFill();
	var txt = new createjs.Text("hello world","20px Arial","#000");
	this.addChild(Rect);
	this.addChild(txt);
}
childContainer.prototype = new createjs.Container();